(19)

(11)

EP 4 189 933 A1

(12)

(43) Date of publication: 07.06.2023 Bulletin 2023/23 (21) Application number: 21735896.9 (22) Date of filing: 18.06.2021

(51) International Patent Classification (IPC):  H04L 41/00(2022.01) (52) Cooperative Patent Classification (CPC): H04L 41/0813; H04L 41/0895; H04L 41/0894 (86) International application number: PCT/EP2021/066654 (87) International publication number: WO 2022/022889 (03.02.2022 Gazette 2022/05)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 31.07.2020 WO PCT/CN2020/106156 (71) Applicant: Telefonaktiebolaget LM ERICSSON (PUBL) 16483 Stockholm (SE)	(72) Inventors: SONG, Yumei 417 67 Göteborg (SE) ZHANG, Hong 417 62 Göteborg (SE) FERNANDEZ ALONSO, Susana 28009 Madrid (ES) HE, Yingjiao Shanghai, 200335 (CN) XU, Juan Shanghai, 200335 (CN) (74) Representative: Ericsson  Patent Development Torshamnsgatan 21-23 164 80 Stockholm 164 80 Stockholm (SE)